Finding the Third Proportional to 17,478 and 34,956

Step by Step Solution

1. Step 1: Write the proportion equation
   17,478 : 34,956 = 34,956 : x
2. Step 2: Convert to fraction form
   17,478/34,956 = 34,956/x
3. Step 3: Cross multiply
   17,478x = 34,956 × 34,956
4. Step 4: Simplify right side
   17,478x = 1,221,921,936
5. Step 5: Solve for x
   x = 1,221,921,936/17,478
6. Step 6: Final answer
   x = 69,912